1. Geocoding: The conversion of a ' place name string ' to ' latitude and longitude ' [Geocoder geocodeaddressstring:-(void) geocoder{1. Creating the encoding/anti-encoding managerClgeocoder *geocoder = [[Clgeocoder alloc]init];2. Geocoding: Convert ' place name string ' to ' latitude and longitude '[Geocoder geocodeaddressstring:@ "Beijing" completionhandler:^ (Nsarray *placemarks, Nserror *error) {Placema
information literacy
1. Schematic diagram
2. Meridian: Through the London Greenwenger Observatory
Go east (to the right), it's longitude (E)
Go West (to the left), it's longitude (W)
Things by the 180 °, a total of 360 °
3. Equator: Zero dimensional dimension
Go North (top), northern latitude (N)
Go south (below), it's latitude (S)
South latitude each 90 °, a total of 180 °
Tip: The greater the Latitude (1°≈111km) across the longitude, the greater the range, the smaller the things y
---restore content starts---Basic Android itself with the Geocoder this class can also be achieved for the latitude and longitude of the positive and negative Yi, but its own bugs exist a lot, especially in the stability of the resolution here, Google provides geocoding stability more good, although its usage is a little more complex, In fact, its general working principle is the HTTP protocol, Google has an open interface, we will be the latitude and
=longitude , QS can become the following three kinds of forms:
Location=latitudelocation=longitude
Location[0]=latitudelocation[1]=longitude
Location[]=latitudelocation[]=longitude
are not in line with the Baidu Map API interface requirements.If you want to avoid the trouble of string connection, using the String-format library is also very convenient, but the URL will also knock very long, it is better to use the QueryString library beautiful.Or you can use the QueryString
: parse the JSON string
// Parse the root element to obtain an array jsonarray jsonobjs = new jsonobject (STR ). getjsonarray ("Results"); // retrieves the first JSON object in the array (in this example, the array actually contains only one element). jsonobject jsonobj = jsonobjs. getjsonobject (0); // parses the formatted_address value string address = jsonobj. getstring ("formatted_address"); // parse the geometry jsonobject geometry = jsonobj in the json object. getjsonobject ("Geometry"); /
German api:http://lbs.amap.com/api/webservice/guide/api/georegeo/Http://restapi.amap.com/v3/geocode/geo?key=7de8697669288fc848e12a08f58d995es=rsv3city= , Hangzhou Address= Modern Building, No. 87th Tiancheng Road, Hangzhou, ChinaThe key on the side is the key that is open to others, and it feels good to use it. Basically there is no big limit, using the top interface to get latitude and longitude is basically 100% successful, but this coordinate system is GCJ02 coordinates.The result information
CODE:#!/usr/bin/python #-*-Coding:utf-8-*-"Created on 2014-8-20@author:guaguastd@name:geocode_location_bing.py" From geopy Import Geocodersgeo_app_key = "G = geocoders. Bing (Geo_app_key) for City in ["Beijing", "Nashville", "NewYork"]: print
Step 1: Construct the URL required by the Geocoder APIURL formatHttps://maps.googleapis.com/maps/api/geocode/output? ParametersThe output option is json/xml, and the parameters option is address/language/sensor.URL exampleHttps://maps.googleapis.com/
Postal code
WebService type: RestURL: ws.geonames.org/postalcodesearch?Parameters: postalcode, placename, maxrows, CountryResult: returns a list of places for the placename/postalcode query as XML documentExample
Nominatim (from Latin, meaning "name") is a tool (reverse geocoding) that can search for data in OSM by name and address and generate a synthetic address for the OSM point. This tool can be found in http://nominatim.openstreetmap.org. Nominatim is also used in the Search Toolbar on the OpenStreetMap home page, and also provides search support for Mapquest Open initiative.This page provides instructions for
are some practical PHP libraries that can execute Web development projects faster and more efficiently. Today, the small series will list 15 such PHP libraries, welcome to the tasting!1, MinkMink is a library of PHP 5.3 that can be used to simulate the interaction between a Web application and a browser in a test. This library enables developers to use a single API to operate on a variety of different browser emulators simultaneously. Mink also provides an effective way to control the browser,
backgroundA recent project is the need to implement offline maps on WPF clients, although they have previously been exposed to web and Android online maps, but it is really impossible to do so for offline maps. Later in the blog Park saw a lot about gmap.net introduction, and applied the gmap.net in the project, so quickly realized the function of offline map.The following paragraph is excerpted from the original address of the project (http://greatmaps.codeplex.com/), which is the introduction
Gmap.net is great and powerful, free, cross platform, open source. NET control. Enable use routing, geocoding, directions and maps from Coogle, Yahoo!, Bing, OpenStreetMap, ArcGIS, Pergo, Sigpac, Yandex , mapy.cz, maps.lt, ikarte.lv, Nearmap, Ovimap, Cloudmade, Wikimapia, MapQuest in Windows Forms Presentation, Suppor TS caching and runs on Windows mobile! As mentioned above, Gmap.net is a. NET control, op
Taking the logistics industry as an example, this paper analyzes the application methods of PostgreSQL and greenplum in logistics industry such as location information processing, optimal path algorithm, machine learning and so on. It refers to the address conversion to coordinate problems, more professional nouns should be "geocoding", that is, to know an address, such as Beijing Haidian District, 10 Street, 10th, how to obtain the corresponding lati
These days because of other affairs, interrupted their own study plan, today continue my translation, to avoid the halfway and waste.Note: The original article is Dr. Charles Severance's "Python for Informatics". The code in this article is rewritten with version 3.4 and passed in the native test.13.7 Google's geocoding Web servicesGoogle Inc. has a very good web service called geocoding. This service allow
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